4251943646 has 4 divisors (see below), whose sum is σ = 6377915472. Its totient is φ = 2125971822.

The previous prime is 4251943643. The next prime is 4251943693. The reversal of 4251943646 is 6463491524.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 4251943597 and 4251943606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4251943643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062985910 + ... + 1062985913.

It is an arithmetic number, because the mean of its divisors is an integer number (1594478868).

Almost surely, 2^4251943646 is an apocalyptic number.

4251943646 is a deficient number, since it is larger than the sum of its proper divisors (2125971826).

4251943646 is a wasteful number, since it uses less digits than its factorization.

4251943646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125971825.

The product of its digits is 622080, while the sum is 44.

The square root of 4251943646 is about 65206.9294323847. The cubic root of 4251943646 is about 1620.0527907910.

The spelling of 4251943646 in words is "four billion, two hundred fifty-one million, nine hundred forty-three thousand, six hundred forty-six".